ADSP-BF705BBCZ-4 datasheet(92/116 Pages) AD

92 / 116 page

Rev. A

Page 92 of 116

September 2015

ADSP-BF700/701/702/703/704/705/706/707

Serial Peripheral Interface (SPI) Port—SPI_RDY Timing

SPI_RDY is used to provide flow control. The CPOL and CPHA bits are set in SPI_CTL, while LEADX, LAGX, and STOP are in 

SPI_DLY.

Table 59. SPI Port—SPI_RDY Timing

VDD_EXT

1.8 V/3.3V Nominal

Parameter

Min

Max

Unit

Timing Requirements

tSRDYSCKM0

Minimum Setup Time for SPI_RDY De-assertion in

Master Mode Before Last SPI_CLK Edge of Valid

Data Transfer to Block Subsequent Transfer with

CPHA = 0

(2.5 + 1.5 × BAUD1) × tSCLK0 + 14.5

1 BAUD value set using the SPI_CLK.BAUD bits.

tSRDYSCKM1

Minimum Setup Time for SPI_RDY De-assertion in

Master Mode Before Last SPI_CLK Edge of Valid

Data Transfer to Block Subsequent Transfer with

CPHA = 1

(2.5 + BAUD1) × tSCLK0 + 14.5

Switching Characteristic

tSRDYSCKM

Time Between Assertion of SPI_RDY by Slave and

First Edge of SPI_CLK for New SPI Transfer with

CPHA = 0 and BAUD = 0 (STOP, LEADX, LAGX = 0)

3 × tSCLK0

4 × tSCLK0 + 17.5

Time Between Assertion of SPI_RDY by Slave and

First Edge of SPI_CLK for New SPI Transfer with

CPHA = 0 and BAUD ≥ 1 (STOP, LEADX, LAGX = 0)

(4 + 1.5 × BAUD1) × tSCLK0

(5 + 1.5 × BAUD1) × tSCLK0 + 17.5 ns

Time Between Assertion of SPI_RDY by Slave and

First Edge of SPI_CLK for New SPI Transfer with

CPHA = 1 (STOP, LEADX, LAGX = 0)

(3 + 0.5 × BAUD

1) × t

SCLK0

(4 + 0.5 × BAUD

1) × t

SCLK0 + 17.5

Figure 37. SPI_RDY Setup Before SPI_CLK with CPHA = 0

SPI_CLK

(CPOL = 0)

SPI_CLK

(CPOL = 1)

tSRDYSCKM0

SPI_RDY

ADSP-BF705BBCZ-4 Datasheet(PDF) 92 Page - Analog Devices

ADSP-BF705BBCZ-4 Datasheet(HTML) 92 Page - Analog Devices

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 ...More

Datasheet Download

Link URL